Cement shingle



June 1l, 1935.

c. DIETRl'cHs CEMENT SHINGLE Filed Feb; 26, 195o ATTO R N EYS 155` color onclrsdesired; eithrlwith different colorsV forriilyeolor the Whole batch.

shingle;

Patented June 1`1, 1935 I I 21,004,465

. "-:CEIYITENTSHIGLE y Charles epietrichrs, 'Little Ferry, `N.,J.,xjassignor ato. Walker Cement .Broducta "1110 Little Ferry,

N-JvicPf-Poemlf New Jersey: f .l "applicationtrebmaryzcfisso, seriaiNo. 431.445 et, (oils-so) Y Thisdnvention relates t'ocein'ent shingles an'd 'a ing enoughl water to producef'a 'batch capable fof method of making -thefsama andhasffor'itsoblowing and then stirring in additional dry mate# jectfto produce a cernentffshingle"whichy may rial tolethickenthebatch as required. `used'in the construction offroo'fs inf-'thesamefman- Any suitable Vpigment as heretofore .employed in'gthe shingles :directly tothefwood-sheathing. that a uniform coloring'oi thebatch rcan be best A1furtherobjectofA4 the iinvention li'sitoprovide secured by mixing thedesiredpigments with sufan improved shingle of this kindwhich not cient oil to form "aI-thick paste, then thoroughly l undulyheavy'and whichlmakes a rooff pleasing mixing this paste"into a portion of the cement 1o appearanceclosely-simulating the appearanceof which is to beladded tothetbatchiin the propor- 10 natural rough hewnvslatenow largelywusejd` for l tion, for'example, vof one part ,of the color-mixture `ornamentil'frcofs.-

-` to tenjparts of cement, withfsuicient water'to A further objectief-the invention Yisto proviue vmake a ,thin batch. 4'Ih-s Smallibatch of 'cement ashing'le'of this classic/hieldmaylbe'madehinfany added 'to the cementfmixture will affect'and uniconned to separatel'portions l'olf the shinglaor Aiter` the batch of cement is iilledinto `the withthe colorsoverlapping;producing the twomold jA andleveled oitoproduce `shingles of the tone effect el,iai'racteristicof"weatheredroongg` desired thickness, the platen Bis jpresseddown A further Iobject offthe invention lis iso-provide tothe exposed surface of the cement, thereby, as 9()V ashingle' offtliisclass which isnotaj'iectedby the shown in Fig. 2; shaping'thefacefofithe shingle 1 2b weathenfigvhich willretain its colors permanently along 'theedge where itis tol be overlapped to t and-whichis of lcwmanufaturingcostcompared the underside of thehexposed edge of the shingle withothertypes', of roong. Y asjformedbythe bottom-*of the mold. Asfshown, fln'the accompanyingA drawing I have'illiistrat `the bottom of 4the molclljis formed -withbeads to' 25' ed my improved shingle and asimpl'e apparatus produce-fa grooveiintheundersideofthe-shingle. '25 whereby the process rof manufacturing may VAbe and the fplatenlis'providedwithgroovesfr-fcrm carriedout.l ingjcorresponding beads-1er ridges in the upper In said drawing:` Y face of"the"`shin'gle."Thestrips Vmaking up the Figure 1 is a perspective View of myimproved platen are forced down into the cement suiiicientt Y Y y ly to make a contact with the strips C' forming 30 Fig. 2 shows a mold and platen which maybe the divisions between the shingles, thereby formemployed for molding the shingle; ing a smooth surface` across the edge of the i Fig. 3 illustrates a step in the method of man-A shingle` so that the overlapped shingles will t ufacture whereby an attractive nished surface closely together;y I

may be secured; and While the cement is in the mold, and before it 35 4 Fig. 4 is a view similar to Fig. 2, of. a portion is set, the surface may beroughened in any de` of a modified form of mold and platen. sired manner. .One method whichI have found To manufacture `my improved shingle, I first to produce pleasingeiects without requiring any make up a batch of cement-according to the folparticular skill and experience, is to blow the sur- 40 lowing formula: t l `face of the cementv with air atcomparatively low 40 i. e pressure. Anysuitable pressure maybe employed glfppmxmately 100 rounds) if properly controlled. I have found that about l gallon of asphalt on Y fteen pounds pressure can be readily handled 5 v with an ordinary spring valve nozzle such as'ilpounds of calcium chloride 2 or 3 pounds of Cocoanut fibra lustrated, V1n handling cement.. The blast of au' 4o i against the surface will form'ridges 1n the cement TO this iS added a Pigment COmDOSitOn sufficient according to the direction of discharge of the air. to co-lor the batch. Enough water is added to the The cement tends to llow back tov the level surbatch to give the desired COI1SStenCy,-which will face but if of proper consistency the ridges will be varied according to the `surface effect which it Vremain `but there` willbe some iiow, leaving an 50 Y is desired to obtain. Generally speaking, the `undulating surface as distinguished from a surconsistency will be such that when the batch is face presenting sharp edges. 'Ihe degree of flow poured into the mold it will be just too thick to will of course depend on the consistency of the flow freely and producefa smooth, `flat surface. cement so that all sorts of different effects may This consistency may readily be obtained by addbe readily had.` As soon as the cement is set 55 the shingles are removed from the mold and allovvedl to harden thoroughly before being applied to the roof.

I have found that shingles so made may be attached to the roof by nailing Without previously punching holes for the nails. The cocoanut fibre prevents the shingles from cracking When the nails are driven through it. This fibre alsoV assists in preserving the rough surface of the shingle, giving a surface texture to the shingle very similar to that of rough hewn slate. The

oil makes the mixture Waterproof and the calf cium chloride aids in producing a dense, glazed surface.

If it is desired, the nail holes may be readily molded in the shingle by the simple expedient of providing the platen strips with nails as shown in Fig. 4. If the nails are slightly greased just before the platen is forced down into the shingle, the platen can be removed Without difculty, leaving nail holes in the ridges along the upper edge of the shingles.

A pleasing two-tone effect may be had by placing a second and differently colored layer of cement over the topy of the shingle before using the'air gun. This surface mixture should be made With oil and calcium chloride in a quantity at least as great as thatemployed in the main batch, in order that the surfaceV may have the desired qualities. This second layer of cement is spread on thin so that when treated with the air gun it will be blown away in spots, exposing the color of the batch beneath. Three-color effects may be similarly obtained and also different shingles and different parts of the same shingle may be differently colored.

A Another method which may be employed to give pleasing surface effects is to brush the surface of the cementV after the mold is filled, with an ordinarypwhisk broom. Both the two-tone and three-tone effects may be so produced.

1 claim: v

1. The methodrof forming( cement shingles Y Y which comprises pouring a suitable cement mixture containing VVa pigment into Afa mold for shaping the under side of the shingle, applying to the exposed surface a second thin layer of cement containing a differently colored pigment and then treating the upper surface while still plastic to shift parts of said second layer from their original positions to different positions on the surface so as to produce irregular undulations and thereby to uncover in irregular areas por' tions of the underlying layer. v

2. 'I'Lhe method of forming cement shingles which comprises pouring a suitable cement mixturecontaining a pigment into a mold for shaping the under side'of the shingle, Vapplying to the exposed surface a second thin layer of cement containing a differently colored pigment and then treating the upper surface with an air blast to produce irregular undulations and to uncover in irregular areas portions of the underlying layer.

3. The method of forming cement shingles which comprises pouring a cement mixture of suitable consistency into a mold for shaping the under side of the shingle and then treating the upper surface of the same With an air blast to produce irregular undulations in the l'shingle surface, the cement mixture being suiiiciently plastic to permit the formation of the undulations in the surface thereof under the influence of the air blast and yet sufficiently stiff to pre- Vvent the undulations from disappearing before the material hardens. v .Y

4. The method of forming cement v.shingles which Vcomprises pouring a cement mixture into a moldl for shaping the under side of a shingle, and then blowing With a jet of air the upper surface of the cement to form ridges therein, the

cementrmixture VbegingV of such consistency that said ridges will remain sufficiently to produce an undulating surface in the shingle. v Y

5. The method Vof forming cement shingles which comprises pouring a cement mixture into a mold for shaping the under side of fthe shingle, and then blowing the upper surface ofsaid mix-v ture With a jet of air at about fifteen pounds pressure per square inch thereby forming ridges in the surface of said mixture,the mixture being of such consistency that said ridges will remain sufciently to produceV an undulating surface in the shingle.V

CHARLES DIETRICHS. 

